WO2021059661A1 - アンテナモジュールおよびそれを搭載した通信装置、ならびに回路基板 - Google Patents
アンテナモジュールおよびそれを搭載した通信装置、ならびに回路基板 Download PDFInfo
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- WO2021059661A1 WO2021059661A1 PCT/JP2020/026388 JP2020026388W WO2021059661A1 WO 2021059661 A1 WO2021059661 A1 WO 2021059661A1 JP 2020026388 W JP2020026388 W JP 2020026388W WO 2021059661 A1 WO2021059661 A1 WO 2021059661A1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2283—Supports; Mounting means by structural association with other equipment or articles mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/185—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces wherein the surfaces are plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
Definitions
- the present disclosure relates to an antenna module and a communication device equipped with the antenna module, and more specifically, to a structure of an antenna module for improving antenna characteristics.
- Patent Document 1 discloses an antenna device in which a plurality of flat plate-shaped radiating elements (patch antennas) are formed on a rectangular substrate.
- a flat plate-shaped ground electrode is arranged facing the radiating element, and radio waves are radiated by electromagnetic field coupling between the radiating element and the ground electrode.
- Patent Document 1 An antenna device as disclosed in Japanese Patent Application Laid-Open No. 2018-148290 (Patent Document 1) is used, for example, in a mobile terminal such as a mobile phone or a smartphone.
- a mobile terminal such as a mobile phone or a smartphone.
- the antenna device may be arranged in a narrow area on the side surface of the housing.
- a ground electrode having a sufficiently large area with respect to the radiating element in order to realize the desired antenna characteristics.
- the antenna device is arranged in a narrow area limited as described above, it may not be possible to make the ground electrode sufficiently wide with respect to the radiating element.
- the ground electrode may not have a symmetrical shape depending on the installation location of the antenna device or the positional relationship with peripheral devices. When the size and shape of the ground electrode are limited in this way, the lines of electric force between the radiation element and the ground electrode are disturbed, which may affect the antenna characteristics such as gain, frequency band, or directivity. is there.
- the present disclosure has been made to solve such a problem, and an object thereof is an antenna characteristic when the size and / or shape of a ground electrode is limited in an antenna module in which a patch antenna is formed. It is to suppress the decrease of.
- the antenna module includes a dielectric substrate on which a plurality of dielectric layers are laminated, and a radiation element, a ground electrode, and a peripheral electrode formed on the dielectric substrate.
- the radiating element emits radio waves in the first polarization direction.
- the ground electrode is arranged to face the radiating element.
- the peripheral electrode is formed in a plurality of layers between the radiation element and the ground electrode, and is electrically connected to the ground electrode.
- the peripheral electrodes are arranged at positions symmetrical with respect to at least one of the first direction parallel to the first polarization direction and the second direction orthogonal to the first polarization direction.
- the antenna module includes a dielectric substrate on which a plurality of dielectric layers are laminated, and a first radiation element, a second radiation element, a ground electrode, and a peripheral electrode formed on the dielectric substrate. And.
- the first radiating element and the second radiating element are arranged adjacent to each other.
- the ground electrode is arranged so as to face the first radiating element and the second radiating element.
- the peripheral electrodes are formed in a plurality of layers between the first radiating element and the ground electrode, and a plurality of layers between the second radiating element and the ground electrode, and are electrically connected to the ground electrode.
- Peripheral electrodes are positioned symmetrically with respect to at least one of the first direction parallel to the polarization direction of the emitted radio waves and the second direction orthogonal to the polarization direction in each of the first radiation element and the second radiation element. Is placed in.
- the circuit board according to the third aspect of the present disclosure is a device for supplying a high-frequency signal to a radiating element, and includes a dielectric substrate on which a plurality of dielectric layers are laminated, a ground electrode, and peripheral electrodes. ..
- the radiating element emits radio waves in the first polarization direction.
- the ground electrode is arranged to face the radiating element.
- the peripheral electrode is formed in a plurality of layers between the radiation element and the ground electrode, and is electrically connected to the ground electrode.
- the peripheral electrodes are arranged at positions symmetrical with respect to at least one of the first direction parallel to the first polarization direction and the second direction orthogonal to the first polarization direction.
- peripheral electrodes electrically connected to the ground electrode are arranged on a plurality of layers of the dielectric substrate between the radiation element and the ground electrode. Further, the peripheral electrodes are arranged at positions symmetrical to at least one of a first direction parallel to the polarization direction of the radiating element and a second direction orthogonal to the first direction.
- FIG. 5 is a block diagram of a communication device to which an antenna module according to the first embodiment is applied. It is a top view of the 1st example of the antenna module according to Embodiment 1.
- FIG. It is a side perspective view of the antenna module of FIG. It is a figure for demonstrating the state of the electric line of force between a radiating element and a ground electrode in the case where there is no peripheral electrode. It is a figure for demonstrating the state of the electric line of force between a radiating element and a ground electrode when there is a peripheral electrode.
- It is a top view of the 2nd example of the antenna module according to Embodiment 1.
- FIG. It is a perspective view of the antenna module of FIG.
- FIG. 1 It is a figure for demonstrating the antenna characteristic by the presence or absence of a peripheral electrode. It is a figure which shows the 1st modification of the arrangement of the peripheral electrode. It is a figure which shows the 2nd modification of the arrangement of the peripheral electrode. It is a perspective view of the antenna module according to Embodiment 2.
- FIG. 2nd substrate when the antenna module of FIG. 11 is seen from the X-axis direction. It is a figure for demonstrating the antenna characteristic by the presence / absence of a peripheral electrode in Embodiment 2.
- FIG. It is a top view of the antenna module of the modification 1. It is a top view of the antenna module of the modification 2. It is a top view of the antenna module according to Embodiment 3.
- Embodiment 3 It is a figure for demonstrating the isolation of two polarized waves by the presence and absence of a peripheral electrode in Embodiment 3. It is a top view of the antenna module according to Embodiment 4. It is a top view of the antenna module of the modification 3. It is a top view of the antenna module of the modification 4. It is a top view of the antenna module according to Embodiment 5. It is a perspective view of the antenna module of FIG. It is a figure for demonstrating the gain characteristic of the antenna module of Embodiment 5. It is a figure for demonstrating the directivity of the antenna module of Embodiment 5. It is a side perspective view of the antenna module according to Embodiment 6.
- FIG. 1 is an example of a block diagram of a communication device 10 to which the antenna module 100 according to the first embodiment is applied.
- the communication device 10 is, for example, a mobile terminal such as a mobile phone, a smartphone or a tablet, a personal computer having a communication function, or the like.
- An example of the frequency band of the radio wave used for the antenna module 100 according to the present embodiment is a radio wave in the millimeter wave band having a center frequency of, for example, 28 GHz, 39 GHz, 60 GHz, etc., but radio waves in frequency bands other than the above are also available. Applicable.
- the communication device 10 includes an antenna module 100 and a BBIC 200 constituting a baseband signal processing circuit.
- the antenna module 100 includes an RFIC 110, which is an example of a power feeding circuit, and an antenna device 120.
- the communication device 10 up-converts the signal transmitted from the BBIC 200 to the antenna module 100 into a high-frequency signal by the RFIC 110, and radiates it from the antenna device 120. Further, the communication device 10 transmits the high frequency signal received by the antenna device 120 to the RFIC 110, down-converts the signal, and processes the signal by the BBIC 200.
- FIG. 1 shows an example in which the antenna device 120 is formed by a plurality of feeding elements 121 arranged in a two-dimensional array, the one-dimensional array in which the plurality of feeding elements 121 are arranged in a row. It may be. Further, the antenna device 120 may have a configuration in which the feeding element 121 is provided independently. In the present embodiment, the feeding element 121 is a patch antenna having a flat plate shape.
- the RFIC 110 includes switches 111A to 111D, 113A to 113D, 117, power amplifiers 112AT to 112DT, low noise amplifiers 112AR to 112DR, attenuators 114A to 114D, phase shifters 115A to 115D, and signal synthesizer / demultiplexer. It includes 116, a mixer 118, and an amplifier circuit 119.
- the switches 111A to 111D and 113A to 113D are switched to the power amplifiers 112AT to 112DT side, and the switch 117 is connected to the transmitting side amplifier of the amplifier circuit 119.
- the switches 111A to 111D and 113A to 113D are switched to the low noise amplifiers 112AR to 112DR side, and the switch 117 is connected to the receiving side amplifier of the amplifier circuit 119.
- the signal transmitted from the BBIC 200 is amplified by the amplifier circuit 119 and up-converted by the mixer 118.
- the transmitted signal which is an up-converted high-frequency signal, is demultiplexed by the signal synthesizer / demultiplexer 116, passes through four signal paths, and is fed to different feeding elements 121.
- the directivity of the antenna device 120 can be adjusted by individually adjusting the degree of phase shift of the phase shifters 115A to 115D arranged in each signal path.
- the received signal which is a high-frequency signal received by each feeding element 121, passes through four different signal paths and is combined by the signal synthesizer / demultiplexer 116.
- the combined received signal is down-converted by the mixer 118, amplified by the amplifier circuit 119, and transmitted to the BBIC 200.
- the RFIC 110 is formed as, for example, a one-chip integrated circuit component including the above circuit configuration.
- the devices switch, power amplifier, low noise amplifier, attenuator, phase shifter
- corresponding to each power feeding element 121 in the RFIC 110 may be formed as an integrated circuit component of one chip for each corresponding power feeding element 121. ..
- FIG. 2 is a plan view of the antenna module 100 of the first example of the first embodiment.
- FIG. 3 is a side perspective view of the antenna module 100.
- the dielectric layer is omitted so that the internal electrodes can be seen.
- the antenna module 100 includes a dielectric substrate 130, a feeding wiring 140, peripheral electrodes 150, and ground electrodes GND1 and GND2, in addition to the feeding element 121 and RFIC 110.
- the normal direction (radio wave radiation direction) of the dielectric substrate 130 is defined as the Z-axis direction
- the plane perpendicular to the Z-axis direction is defined by the X-axis and the Y-axis.
- the positive direction of the Z axis in each figure may be referred to as an upper side
- the negative direction may be referred to as a lower side.
- the dielectric substrate 130 includes, for example, a low temperature co-fired ceramics (LCC) multilayer substrate, a multilayer resin substrate formed by laminating a plurality of resin layers composed of resins such as epoxy and polyimide.
- LCC low temperature co-fired ceramics
- the dielectric substrate 130 has a substantially rectangular shape, and the feeding element 121 is arranged in a layer (upper layer) close to the upper surface 131 (the surface in the positive direction of the Z axis).
- the power feeding element 121 may be exposed on the surface of the dielectric substrate 130, or may be arranged in an inner layer of the dielectric substrate 130 as in the example of FIG.
- a case where only the feeding element is used as the radiating element will be described as an example, but in addition to the feeding element, a non-feeding element and / or a parasitic element may be used. It may be arranged.
- a flat plate-shaped ground electrode GND2 is arranged in a layer (lower layer) closer to the lower surface 132 (the surface in the negative direction of the Z axis) than the power feeding element 121 so as to face the feeding element 121.
- the ground electrode GND1 is arranged on the layer between the power feeding element 121 and the ground electrode GND2.
- the layer between the ground electrode GND1 and the ground electrode GND2 is used as a wiring region.
- a wiring pattern 170 that forms a power supply wiring for supplying a high-frequency signal to the radiating element, a stub and a filter connected to the power supply wiring, and a connection wiring for connecting to other electronic components is arranged. Has been done.
- the wiring region in the dielectric layer on the side opposite to the feeding element 121 of the ground electrode GND1 in this way, unnecessary coupling between the feeding element 121 and each wiring pattern 170 can be suppressed.
- the RFIC 110 is mounted on the lower surface 132 of the dielectric substrate 130 via the solder bumps 160.
- the RFIC 110 may be connected to the dielectric substrate 130 by using a multi-pole connector instead of the solder connection.
- a high frequency signal is supplied from the RFIC 110 to the feeding point SP1 of the feeding element 121 via the feeding wiring 140.
- the power feeding wiring 140 rises from the RFIC 110 through the ground electrode GND2 and extends the wiring region. Then, the feeding wiring 140 rises from directly below the feeding element 121 through the ground electrode GND1 and is connected to the feeding point SP1 of the feeding element 121.
- the feeding point SP1 of the feeding element 121 is arranged at a position offset in the positive direction of the Y axis from the center of the feeding element 121.
- radio waves having the Y-axis direction as the polarization direction are radiated from the feeding element 121.
- the peripheral electrode 150 is formed on a plurality of dielectric layers between the feeding element 121 and the ground electrode GND1 at the end of the dielectric substrate 130.
- peripheral electrodes 150 are arranged along each side of the rectangular feeding element 121 when viewed in a plan view from the normal direction (the positive direction of the Z axis) of the dielectric substrate 130.
- the peripheral electrodes 150 arranged along each side are arranged at positions symmetrical with respect to the polarization direction (Y-axis direction) of the feeding element 121 and the direction orthogonal to the polarization direction (X-axis direction). ..
- the peripheral electrodes 150 are arranged so as to overlap each other in the stacking direction. That is, the peripheral electrode 150 forms a virtual conductor wall along each side of the dielectric substrate 130.
- the peripheral electrodes 150 adjacent to each other in the stacking direction are electrically connected to each other by vias 155. Further, the peripheral electrode 150 at the bottom is electrically connected to the ground electrode GND1 by the via 155. That is, the peripheral electrode 150 has a configuration substantially equivalent to a configuration in which the end portion of the ground electrode GND1 is extended in the stacking direction.
- the peripheral electrodes 150 do not have to have the same shape. For example, the electrode size may be increased in the stacking direction of the dielectric substrate 130 as it approaches the ground electrode GND.
- the vias 155 formed in the dielectric layers adjacent to each other in the stacking direction are arranged so as not to overlap each other when viewed in a plan view from the normal direction of the dielectric substrate 130.
- the conductive material (typically copper) forming the via 155 has a smaller compressibility when pressurized than the dielectric material. Therefore, if all the vias 155 of each layer are arranged at the same position when viewed in a plan view from the normal direction of the dielectric substrate 130, when the dielectric substrate 130 is pressure-pressed for crimping the dielectric layer, The reduction rate of the thickness of the via 155 portion becomes smaller than that of the other dielectric portions, which may cause a variation in the thickness of the entire dielectric substrate 130. Therefore, as described above, the thickness accuracy of the dielectric substrate 130 after molding can be improved by setting the vias 155 of the dielectric layers adjacent to each other in the stacking direction at different positions.
- the electrical connection between the peripheral electrodes 150 and between the peripheral electrode 150 and the ground electrode GND1 is not limited to the direct connection by the via 155, and a part or all of the peripheral electrodes may be capacitively coupled. Including.
- radio waves are radiated by electromagnetic field coupling between the radiating element and the ground electrode. Then, in order to realize the desired antenna characteristics, it is necessary to arrange a ground electrode having a sufficiently large area with respect to the radiating element.
- the ground electrode may not have a symmetrical shape depending on the installation location of the antenna device or the positional relationship with peripheral devices.
- the size and shape of the ground electrode are limited in this way, the lines of electric force between the radiation element and the ground electrode are disturbed, which may affect the antenna characteristics such as gain, frequency band, or directivity. is there.
- FIG. 4 is a diagram for explaining the state of the electric lines of force between the radiating element and the ground electrode when a sufficient area of the ground electrode cannot be secured with respect to the radiating element.
- a high-frequency signal is supplied to the feeding element 121 (radiating element)
- an electromagnetic field coupling occurs between the end of the feeding element 121 and the ground electrode GND1.
- an electric line of force is emitted from one end of the feeding element 121 to the ground electrode GND1, and the electric line of force is received from the ground electrode GND1 at the other end.
- the peripheral electrode 150 electrically connected to the ground electrode GND1 is arranged in the layer between the feeding element 121 and the ground electrode GND1. Since the distance between the peripheral electrode 150 and the feeding element 121 is shorter than the distance between the ground electrode GND1 and the feeding element 121, the degree of coupling between the feeding element 121 and the electromagnetic field coupling is higher than that of the ground electrode GND11. 150 is stronger. Therefore, in FIG. 4, the electric lines of force that wrap around to the back surface side of the ground electrode GND will be generated between the peripheral electrode 150 and the peripheral electrode 150 in FIG. As a result, radio waves are suppressed from being radiated to the back surface side of the antenna device, so that deterioration of antenna characteristics such as gain can be suppressed.
- peripheral electrode 150 is arranged at a position symmetrical with respect to the polarization direction of the radio wave and / or the direction orthogonal to the polarization direction. As a result, the symmetry of the electric lines of force generated between the feeding element 121 and the ground electrode GND1 can be improved, so that fluctuations in the polarization direction can be suppressed.
- the peripheral electrode 150 has a length from the surface center CP of the feeding element 121 to the end of the ground electrode GND1 along the polarization direction ( it is preferable that the distance LG) of FIG. 2 placed is less than lambda 0/2.
- (2nd example) 6 and 7 are views showing a second example of the antenna module according to the first embodiment.
- FIG. 6 is a plan view of the antenna module 100A
- FIG. 7 is a perspective view of the antenna module 100A. Also in FIGS. 6 and 7, the dielectric layer is omitted for the sake of simplicity.
- the antenna module 100A of FIG. 6 is an example in which the size of the ground electrode is further limited with respect to the antenna module 100 of FIG. 2, and when the feeding element 121 is arranged in the same manner as the antenna module 100, it is viewed in a plan view.
- the distance between the end of the power feeding element 121 and the end of the ground electrode GND1 is further narrowed.
- the feeding element 121 is centered on the surface center CP of the feeding element 121 in order to secure the distance from the surface center CP of the feeding element 121 to the end of the ground electrode GND1 as much as possible in the polarization direction. As a result, it is arranged so as to be tilted by 45 ° around the Z axis. That is, the feeding point SP1 is arranged at a position offset by the same distance from the surface center CP of the feeding element 121 in the negative direction of the X axis and the positive direction of the Y axis.
- the polarization direction is a direction inclined by 45 ° from the positive direction of the Y axis to the negative direction of the X axis (direction of the alternate long and short dash line CL1 in FIG. 6).
- the feeding element 121 protrudes from the range of the ground electrode GND1 (that is, the range of the dielectric substrate 130), so that the four corners of the square feeding element 121 Is cut off, and the feeding element 121 has an octagonal shape as a whole.
- the peripheral electrode 150A having a substantially right triangle is formed between the feeding element 121 and the ground electrode GND1 along the side along the polarization direction of the feeding element 121 and the side orthogonal to the polarization direction.
- the peripheral electrodes 150A are arranged so that their hypotenuses face each other in the first direction parallel to the polarization direction or the second direction orthogonal to the polarization direction. In this way, by arranging the peripheral electrode 150A at a position symmetrical to the polarization direction of the radio wave and / or the direction orthogonal to the polarization direction, the degree of coupling between the power feeding element 121 and the ground electrode GND1 is increased. Moreover, by improving the symmetry of the electric power line generated between the feeding element 121 and the ground electrode GND1, the deterioration of the antenna characteristics can be suppressed.
- FIGS. 6 and 7 show the case where the peripheral electrode 150A is a substantially right triangle, the shape of the peripheral electrode may be a triangle other than a right triangle, or a rectangular shape as shown in FIG. It may be. Further, the size of the peripheral electrode 150 is preferably equal to or larger than the length of the sides of the opposing power feeding elements 121. Further, assuming that the free space wavelength of the radio wave radiated from the feeding element 121 is ⁇ 0 , the peripheral electrode 150A is grounded from the surface center CP of the feeding element 121 along the polarization direction (direction of the one-point chain line CL1 in FIG. 6). it is preferred that the length to the end of the electrode GND1 (distance Figure 7 LGA) is disposed is less than ⁇ 0/2.
- FIG. 8 shows the simulation results of the configuration of the antenna module 100A of the second example shown in FIG. 6 with that of Comparative Example 1 having no peripheral electrode.
- a perspective view, a plan view, a current distribution diagram of the ground electrode, and an antenna gain of the antenna module are shown from the upper stage.
- contour lines showing currents of the same intensity are drawn by broken lines.
- the antenna gain the peak gain of each angle from the radiation direction (Z-axis direction) is shown in the XY plane with the surface center of the feeding element 121 as the origin.
- the arrangement of the feeding element 121 and the ground electrode GND1 is the same as that of the antenna module 100A, but the peripheral electrode 150A is not arranged. Therefore, in the antenna module 100 # 1 of Comparative Example 1, a part of the electric lines of force wraps around the back surface of the ground electrode GND1. As a result, in the antenna module 100 # 1 of Comparative Example 1, the gain on the back surface side (particularly 120 ° to 180 °) is large, and the total peak gain is 4.8 [dBi]. In comparison with this, in the antenna module 100A having the peripheral electrode 150A, the gain on the back surface side is small, and the total peak gain is improved to 5.3 [dBi]. That is, it can be seen that the peripheral electrode 150A suppresses the wraparound of the electric lines of force to the back surface side.
- the dimension of the ground electrode GND1 in the Y-axis direction is shorter than the dimension in the X-axis direction, and the polarization direction passes through the surface center CP of the feeding element 121.
- the shape of the ground electrode is asymmetric. Therefore, the current distribution at the ground electrode of the antenna module 100 # 1 is a distorted ellipse with the Y-axis direction as the short axis.
- the peripheral electrodes 150A are arranged at positions symmetrical with respect to the polarization direction and the direction orthogonal to the polarization direction. Therefore, the current distribution at the ground electrode is closer to a perfect circle than that of Comparative Example 1, and it can be seen that the symmetry of the current is improved.
- the ground electrode By arranging the peripheral electrodes electrically connected to the ground symmetrically, the wraparound of the electric power line generated between the radiation element and the ground electrode to the back surface is suppressed, and the symmetry of the electric power line is improved. be able to. This makes it possible to suppress a decrease in antenna characteristics when the size and / or shape of the ground electrode is limited.
- FIG. 9 is a view (side perspective view) showing a first modification of the arrangement of the peripheral electrodes.
- the arrangement of the peripheral electrodes in the stacking direction is different from that of the antenna module 100 shown in FIG. More specifically, in the antenna module 100B, the peripheral electrodes 150B formed in the dielectric layer close to the ground electrode GND1 are arranged inside the dielectric substrate 130. In other words, the peripheral electrode 150B is arranged so that the closer it is to the ground electrode GND1 when viewed in a plan view from the normal direction of the dielectric substrate 130, the closer it is to the feeding element 121.
- the degree of coupling between the feeding element 121 and the ground electrode GND1 can be increased, so that the antenna characteristics can be improved. Further, the dielectric material surrounded by the feeding element 121, the ground electrode GND1 and the conductor wall of the peripheral electrode 150C is reduced as compared with the configuration of the antenna module 100 shown in FIG. 2, and the feeding element 121 and the ground electrode GND1 are combined. Capacitance is reduced. This makes it possible to expand the frequency bandwidth of the radiated radio waves.
- FIG. 10 is a view (plan view) showing a second modification of the arrangement of the peripheral electrodes.
- the peripheral electrodes 150C are arranged in an annular shape around the feeding element 121. Even in such a shape of the peripheral electrode, since the peripheral electrode is arranged at a position symmetrical with respect to the polarization direction and the direction orthogonal to the polarization direction, the wraparound of the electric lines of force to the back surface side is suppressed. , The symmetry of the lines of electric force can be improved. Therefore, the antenna characteristics can be improved.
- FIG. 11 is a perspective view of the antenna module 100D according to the second embodiment.
- the antenna device 120A of the antenna module 100D is an array antenna in which a plurality of feeding elements 121 are arranged on a dielectric substrate 130A having a substantially L shape.
- the dielectric substrate 130A includes a flat plate-shaped first substrate 1301 and a second substrate 1302 having different normal directions from each other, and a bent portion 135 connecting the first substrate 1301 and the second substrate 1302.
- the first substrate 1301 is a rectangular flat plate whose normal direction is the Z-axis direction, and four feeding elements 121 are arranged along the Y-axis direction.
- the RFIC 110 is arranged on the back surface side of the first substrate 1301.
- the second substrate 1302 is a flat plate whose normal direction is the X-axis direction, and four feeding elements 121 are arranged along the Y-axis direction.
- a notch 136 is formed at a portion to which the bent portion 135 is connected, and a protrusion 133 protruding in the positive direction of the Z axis from the notch 136 is formed.
- At least a part of each of the feeding elements 121 arranged on the second substrate 1302 is formed in the protruding portion 133.
- Such a configuration is used, for example, in a thin plate-shaped device such as a smartphone, when radio waves are radiated in two directions, the main surface side and the side surface side.
- the first substrate 1301 corresponds to the main surface side
- the second substrate 1302 corresponds to the side surface side.
- the dimensions in the thickness direction of the device, that is, in the Z-axis direction are limited, and there may be a case where a sufficiently wide ground electrode GND1 cannot be secured.
- the shape of the ground electrode GND1 becomes asymmetric with respect to the polarization direction passing through the surface center of each feeding element 121 due to the notch 136 for connection with the bending portion 135, and the shape of the ground electrode GND1 is changed for each feeding element 121. Will be different. Then, since the antenna characteristics of each feeding element 121 of the array antenna become non-uniform, the characteristics of the array antenna as a whole may also deteriorate.
- the antenna characteristics of the plurality of feeding elements constituting the array antenna are made uniform, and the antenna of the entire array antenna is used. Improve properties.
- FIG. 12 is a plan view of the second substrate 1302 when the antenna module 100D of FIG. 11 is viewed from the X-axis direction. In FIG. 12, the dielectric layer is omitted.
- the feeding element 121 arranged on the second substrate 1302 has a configuration similar to that of the antenna module 100A described in the second example of the first embodiment.
- each of the feeding elements 121 has an octagonal shape in which the feeding point SP1 (that is, the polarization direction) is arranged at an angle of 45 ° with respect to the Z axis, and the four corners are deleted.
- the peripheral electrode 150A is arranged in the layer between the feeding element 121 and the ground electrode GND1 at a position facing the side along the polarization direction of the feeding element 121 and the side along the direction orthogonal to the polarization direction. Orthogonal.
- FIG. 13 is a diagram for explaining the difference in antenna characteristics depending on the presence or absence of peripheral electrodes in the array antenna as shown in FIGS. 11 and 12.
- FIG. 13 shows the simulation results of the second substrate 1302 portion of the antenna module 100D of the second embodiment and the antenna module 100 # 2 of Comparative Example 2 in which the peripheral electrode 150A is not arranged.
- the reflection loss of the two feeding elements 121-1 and 121-2 adjacent to the middle stage is shown, and the lower stage shows the case where radio waves are radiated from the four feeding elements 121-1 to 121-4.
- the antenna gain is shown.
- the solid lines LN20 and LN20 # indicate the feeding element 121-1
- the broken lines LN21 and LN21 # indicate the feeding element 121-2.
- the antenna gain the peak gain of the main lobe ML1 of the main lobes ML1 and the side lobes SL1 and SL2 of the radio waves radiated in the X-axis direction is shown.
- the solid line LN25 shows the antenna module 100D of the second embodiment
- the broken line LN26 shows the antenna module 100 # 2 of the comparative example 2.
- the frequency at which the reflection loss is reduced and the frequency bandwidth at which a predetermined reflection loss is realized are slightly deviated between the two feeding elements. .. That is, the two adjacent feeding elements have different antenna characteristics.
- the frequency at which the reflection loss is reduced and the frequency bandwidth are substantially the same in the two adjacent feeding elements, and the variation in the antenna characteristics is reduced. ..
- the antenna gain in the pass band is also larger in the antenna module 100D (solid line LN25) of the second embodiment than in the antenna module 100 # 2 (dashed line LN26) of the comparative example 2, and the antenna characteristics. Can be seen to be improved.
- the polarization direction and / or the polarization direction for each radiating element are limited.
- the peripheral electrodes are arranged at positions symmetrical in the direction orthogonal to the polarization direction, the variation in the antenna characteristics between the radiating elements can be reduced, and the antenna characteristics of the antenna module as a whole can be improved.
- Modification example 1 In the antenna module 100D of the second embodiment shown in FIGS. 11 and 12, a configuration in which peripheral electrodes are individually arranged for each adjacent feeding element has been described. In the first modification, a configuration will be described in which the antenna characteristics are further improved by sharing the peripheral electrodes of the adjacent feeding elements in the array antenna.
- FIG. 14 is a plan view of the antenna module 100D1 according to the first modification.
- the peripheral electrode 150A between the feeding element 121-1 and the feeding element 121-2 and the peripheral electrode 150A between the feeding element 121-3 and the feeding element 121-4 are connected electrodes 151. It is electrically connected and integrated by.
- the peripheral electrode 150A and the connection electrode 151 may be formed by integrating individual elements instead of connecting them.
- the area of the peripheral electrodes that receive the electric lines of force emitted from the feeding element becomes large, so that the electric lines of force that wrap around the back surface of the ground electrode GND1 can be suppressed. it can.
- deterioration of antenna characteristics such as deterioration of antenna gain, narrowing of frequency bandwidth, and fluctuation of polarization direction can be further suppressed.
- peripheral electrodes are standardized, the symmetry of the electric field line distribution in each feeding element may deteriorate. In such a case, the peripheral electrodes that are not standardized may deteriorate.
- the size and / or shape of the device may be adjusted as appropriate.
- the feeding element 121 is arranged so that the peripheral electrodes 150 themselves are in contact with each other without using the connection electrode 151 of FIG. 14, and the adjacent peripheral electrodes 150 are connected. It has become a common structure. Also in the antenna module 100D2 of FIG. 15, since the area of the peripheral electrode that receives the electric lines of force emitted from the feeding element becomes large, the antenna characteristics such as deterioration of the antenna gain, narrowing of the frequency bandwidth, and fluctuation of the polarization direction are obtained. Can be further suppressed.
- FIG. 16 is a plan view of the antenna module 100E according to the third embodiment.
- the antenna module 100E is an array antenna similar to the antenna module 100D of the second embodiment, except that two feeding points SP1 and SP2 are arranged in the feeding elements 121-1 to 121-4. ..
- the direction polarized by 45 ° from the Z axis to the negative direction of the Y axis (extending direction of the alternate long and short dash line CL1) is polarized. Radio waves in the direction are emitted.
- a radio wave having a polarization direction in a direction inclined by 45 ° from the Z axis to the positive direction of the Y axis (extending direction of the alternate long and short dash line CL2) is emitted.
- the power feeding element 121-2 is arranged so as to be rotated by 180 ° with respect to the adjacent power feeding element 121-1. Further, the feeding element 121-4 is arranged so as to be rotated by 180 ° with respect to the adjacent feeding element 121-3. Then, between the feeding elements arranged in such a manner that they are rotated by 180 °, a high frequency signal whose phase is inverted is supplied to the same feeding point. By such phase adjustment, the phase of the radio wave in each polarization direction radiated from each feeding element can be matched. Further, by rotating the power feeding elements arranged adjacent to each other by 180 ° and arranging them, the cross polarization discrimination (XPD) can be improved.
- XPD cross polarization discrimination
- the peripheral electrodes 150A are arranged at positions symmetrical with respect to the feeding elements 121-1 to 121-4 in the polarization direction and the direction orthogonal to the polarization direction. As a result, it is possible to reduce the variation in the antenna characteristics between the feeding elements due to the limitation of the size and / or shape of the ground electrode GND1, and improve the antenna characteristics of the antenna module as a whole.
- FIG. 17 is a diagram for explaining the isolation of two polarized waves depending on the presence or absence of peripheral electrodes in a dual polarized wave type antenna module.
- FIG. 17 shows a simulation result of isolation between two feeding points in the antenna module 100E of the third embodiment and the antenna module 100 # 3 of the comparative example 3 in which the peripheral electrode 150A is not arranged.
- the isolation of the antenna module 100E of the third embodiment is improved as compared with the isolation of the antenna module 100 # 3 of the comparative example 3 in the desired pass band.
- the reflection loss and gain are improved, which in turn leads to an improvement in active impedance.
- the ground electrode is arranged at a position symmetrical to the polarization direction and / or the direction orthogonal to the polarization direction for each radiation element.
- the antenna characteristics can be improved even when there are restrictions on the antenna.
- peripheral electrodes are applied to a dual polarization type array antenna
- a dual polarization type antenna module in the case where one radiation element is used. Is also applicable.
- FIG. 18 is a plan view of the antenna module 100F according to the fourth embodiment.
- the antenna module 100F is a dual polarization type array antenna as in the third embodiment, except that it has a feeding element 122 in addition to the feeding element 121A as a radiating element.
- the non-feeding element 122 is arranged in a layer between the feeding element 121A and the ground electrode GND1.
- the power feeding wiring from the RFIC 110 penetrates the non-feeding element 122 and is connected to the feeding points SP1 and SP2 of the feeding element 121A.
- the dimension of the non-feeding element 122 in the polarization direction is larger than the dimension of the feeding element 121A in the polarization direction. Therefore, the resonance frequency of the non-feeding element 122 is lower than the resonance frequency of the feeding element 121A.
- the antenna module 100F is a dual band type antenna module capable of radiating radio waves in two different frequency bands.
- the feeding element 121A and the non-feeding element 122 are arranged so that the polarization direction is inclined by 45 ° with respect to the Z-axis direction due to the size limitation of the ground electrode GND1. Further, the non-feeding element 122 has an octagonal shape by removing the four corners protruding from the ground electrode GND1.
- the feeding element 121A on the high frequency side functions as an antenna by the electromagnetic field coupling with the non-feeding element 122.
- the non-feeding element 122 functions as an antenna by electromagnetic field coupling with the ground electrode GND1.
- the ground electrode GND1 is not sufficiently wide with respect to the non-feeding element 122, and further, the polarization direction passing through the surface center of the non-feeding element 122. It has an asymmetrical shape.
- Peripheral electrodes 150A are arranged on the layer. As a result, it is possible to reduce the variation in the antenna characteristics among the non-feeding elements 122 and improve the antenna characteristics of the antenna module as a whole.
- both of the two radiating elements may be used as the feeding element.
- FIG. 19 is a plan view of the antenna module 100F1 according to the third modification.
- the peripheral electrodes 150A of the adjacent radiation elements of the antenna module 100F are connected by the connection electrode 151 and shared.
- FIG. 20 is a plan view of the antenna module 100F2 according to the modified example 4.
- the feeding element 121 is arranged so that the adjacent peripheral electrodes 150A are in contact with each other, and the peripheral electrodes 150A are shared with each other, as in the modified example 2 described with reference to FIG. It has become. Even in such a configuration, since it is possible to suppress the wraparound of the electric lines of force emitted from the non-feeding element 122 to the back surface of the ground electrode GND1, the deterioration of the antenna characteristics is further suppressed as compared with the antenna module 100F of the fourth embodiment. can do.
- FIGS. 21 and 22 are diagrams showing the antenna module 100G according to the fifth embodiment.
- FIG. 21 is a plan view of the antenna module 100G
- FIG. 22 is a perspective view of the antenna module 100G.
- the dielectric layer is omitted for the sake of simplicity.
- the peripheral electrode 150D is arranged in place of the peripheral electrode 150A in the antenna module 100A shown in the second example of the first embodiment. Note that, in FIGS. 21 and 22, the description of the elements common to the antenna module 100A shown in FIGS. 6 and 7 will not be repeated.
- the peripheral electrode 150D in the antenna module 100G is formed to have a size slightly smaller than the peripheral electrode 150A shown in FIGS. 6 and 7. More specifically, the peripheral electrode 150A has a shape of a substantially right triangle when the dielectric substrate is viewed in a plan view, but in the example of the peripheral electrode 150D of the fifth embodiment, the right angle of the above-mentioned right triangle is formed. It is formed in a substantially trapezoidal shape with a part of the apex portion (broken area AR1 in FIG. 21) removed. By deforming the shape of the peripheral electrodes to reduce the size in this way, it is possible to expand the space in which other elements can be arranged on the dielectric substrate.
- FIG. 23 shows the frequency characteristics of the antenna gain
- FIG. 24 shows the directivity.
- FIG. 23 it is the frequency characteristic of the antenna gain in the case of the pass band having 28 GHz as the center frequency.
- the solid lines LN40 and LN50 show the case of the antenna module 100A
- the broken lines LN41 and LN51 show the case of the antenna module 100G.
- the antenna gain of the antenna module 100G is smaller than that of the antenna module 100A. It is a little lower overall. However, in the target pass band (25 GHz to 29.5 GHz), an antenna gain of 7 dBi or more can be secured over the entire range.
- the graph of FIG. 24 shows the directivity when a radio wave having a central frequency of 28 GHz is emitted, and the horizontal axis shows the angle from the normal direction of the feeding element 121 in the cross section along the polarization direction. There is. Comparing the peak gains at an angle of 0 °, it can be seen that in the case of the antenna module 100G, although it is about 0.2 dBi lower than that in the case of the antenna module 100A, a peak gain of 8 dBi can be realized. ..
- the gain of the antenna module 100G is slightly larger than that of the antenna module 100A in the region where the angle is larger than 100 ° and the region where the angle is smaller than -100 °. This indicates that the wraparound to the back surface of the dielectric substrate is increasing. That is, in the case of the antenna module 100G, the directivity is also slightly lower than that of the antenna module 100A, but the target specification range can be achieved as a whole.
- the antenna characteristics are slightly inferior to those of the antenna module 100A shown in FIG. 6, but the antenna characteristics are improved as compared with the case where the peripheral electrodes are not used. be able to.
- the degree of freedom of layout in the dielectric substrate can be improved.
- Which configuration of the antenna module 100A and the antenna module 100G is to be adopted is appropriately selected according to the required antenna characteristics and the presence or absence of elements to be arranged in the antenna module.
- the radiating element may be formed on a dielectric substrate different from the dielectric substrate on which other elements are formed.
- FIG. 25 is a side perspective view of the antenna module 100H according to the sixth embodiment.
- the feeding element 121 in the antenna module 100 shown in FIG. 3 of the first embodiment is formed on the dielectric substrate 130B, and the elements other than the feeding element 121 are independent circuit boards from the dielectric substrate 130B. It has a structure formed in 300.
- elements other than the power feeding element 121 in the antenna module 100 of FIG. 3 are arranged on the dielectric substrate 130C, and the RFIC 110 is mounted on the lower surface side of the dielectric substrate 130C.
- the lower surface of the dielectric substrate 130B is arranged so as to face the upper surface of the dielectric substrate 130C of the circuit board 300.
- the power feeding wiring 140 is connected to the power feeding element 121 via a connection terminal 161 arranged between the dielectric substrate 130B and the dielectric substrate 130C.
- a connection terminal 161 a solder bump, a connection connector, or a connection cable is used.
- the degree of freedom in arranging the equipment in the communication device can be increased by forming the circuit board on which the RFIC is arranged and the dielectric substrate on which the radiating element is formed as separate substrates. it can.
- the circuit board may be arranged on the motherboard and the radiating element may be arranged on the housing.
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Abstract
Description
(通信装置の基本構成)
図1は、本実施の形態1に係るアンテナモジュール100が適用される通信装置10のブロック図の一例である。通信装置10は、たとえば、携帯電話、スマートフォンあるいはタブレットなどの携帯端末や、通信機能を備えたパーソナルコンピュータなどである。本実施の形態に係るアンテナモジュール100に用いられる電波の周波数帯域の一例は、たとえば28GHz、39GHzおよび60GHzなどを中心周波数とするミリ波帯の電波であるが、上記以外の周波数帯域の電波についても適用可能である。
次に、図2および図3を用いて、実施の形態1におけるアンテナモジュールの構成の詳細を説明する。図2は、実施の形態1の第1例のアンテナモジュール100の平面図である。また、図3は、アンテナモジュール100の側面透視図である。なお、図2の平面図においては、内部の電極が見るように誘電体層が省略されている。
図6および図7は、実施の形態1に従うアンテナモジュールの第2例を示す図である。図6はアンテナモジュール100Aの平面図であり、図7はアンテナモジュール100Aの斜視図である。図6および図7においても、説明を容易にするために、誘電体層については省略されている。
図8を用いて、周辺電極の有無によるアンテナ特性について説明する。図8においては、図6で示した第2例のアンテナモジュール100Aの構成について、周辺電極を有さない比較例1とのシミュレーション結果を示している。図8においては、上段から、アンテナモジュールの斜視図、平面図、接地電極の電流分布図、およびアンテナゲインが示されている。なお、電流分布図においては、同じ強度の電流を示す等高線が破線で描かれている。また、アンテナゲインは、給電素子121の面中心を原点としたX-Y平面において、放射方向(Z軸方向)からの各角度のピークゲインが示されている。
図9は、周辺電極の配置の第1変形例を示す図(側面透視図)である。図9のアンテナモジュール100Bにおいては、図3で示したアンテナモジュール100と比較すると、周辺電極の積層方向の配置が異なっている。より詳細には、アンテナモジュール100Bにおいては、接地電極GND1に近い誘電体層に形成されている周辺電極150Bほど、誘電体基板130の内側に配置されている。言い換えれば、周辺電極150Bは、誘電体基板130の法線方向から平面視した場合に、接地電極GND1に近くなるほど給電素子121に近くなるように配置されている。
実施の形態1においては、放射素子が単独で配置される構成について説明した。実施の形態2においては、複数の放射素子が配置されたアレイアンテナにおいて周辺電極を用いる構成について説明する。
図11および図12で示した実施の形態2のアンテナモジュール100Dにおいては、隣接する給電素子ごとに個別に周辺電極が配置される構成について説明した。変形例1においては、アレイアンテナにおいて、隣接する給電素子の周辺電極を共通化することによって、アンテナ特性をさらに向上させる構成について説明する。
変形例1においては、隣接する給電素子の周辺電極を別の接続電極によって一体化する構成について説明した。
実施の形態1および実施の形態2においては、1つの放射素子から単独の偏波方向の電波が放射される構成について説明した。実施の形態3においては、1つの放射素子から異なる2つの偏波方向の電波を放射することが可能な、いわゆるデュアル偏波タイプのアンテナモジュールに周辺電極を適用した構成の例について説明する。
上述の実施の形態においては、放射素子から放射される電波の周波数帯域が1つの場合について説明した。実施の形態4においては、各放射素子から異なる2つの周波数帯域の電波を放射することが可能な、いわゆるデュアルバンドタイプのアンテナモジュールについて、上記のような周辺電極を適用した構成について説明する。
図19は、変形例3に従うアンテナモジュール100F1の平面図である。変形例3のアンテナモジュール100F1においては、図14で説明した変形例1と同様に、アンテナモジュール100Fの隣接する放射素子の周辺電極150Aが接続電極151により連結されて共通化されている。このような構成とすることによって、無給電素子122から放出される電気力線の接地電極GND1の裏面への回り込みを抑制できるので、実施の形態4のアンテナモジュール100Fに比べてアンテナ特性の低下をさらに抑制することができる。
図20は、変形例4に従うアンテナモジュール100F2の平面図である。変形例4のアンテナモジュール100F2においては、図15で説明した変形例2と同様に、隣接する周辺電極150A同士が接するように給電素子121が配置され、当該周辺電極150A同士が共通化された構成となっている。このような構成においても、無給電素子122から放出される電気力線の接地電極GND1の裏面への回り込みを抑制できるので、実施の形態4のアンテナモジュール100Fに比べてアンテナ特性の低下をさらに抑制することができる。
接地電極の裏面に回り込む電気力線を周辺電極を用いて抑制するには、周辺電極の面積を大きくすることが好ましい。一方で、誘電体基板内にスタブあるいはフィルタなどの他の要素を形成する場合には、周辺電極を大きくすると、これらの要素のレイアウトが制約され得る。
上述の実施の形態および各変形例においては、放射素子と接地電極とが同じ誘電体基板に配置される構成について説明した。しかしながら、放射素子は、その他の要素が形成される誘電体基板とは異なる誘電体基板に形成される構成であってもよい。
Claims (13)
- 複数の誘電体層が積層された誘電体基板と、
前記誘電体基板に形成され、第1偏波方向に電波を放射する放射素子と、
前記放射素子に対向して配置された接地電極と、
前記放射素子と前記接地電極との間の複数の層に形成され、前記接地電極と電気的に接続された周辺電極とを備え、
前記周辺電極は、前記第1偏波方向に平行な第1方向および前記第1偏波方向に直交する第2方向の少なくとも一方に対して対称な位置に配置される、アンテナモジュール。 - 前記放射素子から放射される電波の自由空間波長をλ0とすると、
前記誘電体基板の法線方向から平面視した場合に、前記第1偏波方向における前記放射素子の面中心から前記接地電極の端部までの最短距離はλ0/2よりも小さい、請求項1に記載のアンテナモジュール。 - 前記誘電体基板の法線方向から平面視した場合に、前記接地電極は、前記放射素子の中心を通る偏波方向に対して非対称の形状を有している、請求項1または2に記載のアンテナモジュール。
- 前記放射素子は、前記第1偏波方向とは異なる第2偏波方向にも電波を放射することが可能である、請求項1~3のいずれか1項に記載のアンテナモジュール。
- 前記放射素子は、
前記接地電極に対向し、第1周波数帯域の電波を放射する第1素子と、
前記第1素子と前記接地電極との間の層に配置され、前記第1周波数帯域よりも低い第2周波数帯域の電波を放射する第2素子とを含む、請求項1~4のいずれか1項に記載のアンテナモジュール。 - 前記周辺電極は、前記誘電体基板の法線方向から平面視した場合に、前記放射素子の周囲を囲う環状に形成される、請求項1~5のいずれか1項に記載のアンテナモジュール。
- 前記周辺電極は、前記誘電体基板の法線方向から平面視した場合に、前記放射素子における前記第1方向に沿った辺、または、前記第2方向に沿った辺に斜辺が対向する略直角三角形の形状を有する、請求項1~6のいずれか1項に記載のアンテナモジュール。
- 複数の誘電体層が積層された誘電体基板と、
前記誘電体基板に形成され、互いに隣接して配置される第1放射素子および第2放射素子と、
前記第1放射素子および前記第2放射素子に対向して配置された接地電極と、
前記第1放射素子と前記接地電極との間の複数の層、および前記第2放射素子と前記接地電極との間の複数の層に形成され、前記接地電極と電気的に接続された周辺電極とを備え、
前記周辺電極は、前記第1放射素子および前記第2放射素子の各々において、放射される電波の偏波方向に平行な第1方向および前記偏波方向に直交する第2方向の少なくとも一方に対して対称な位置に配置される、アンテナモジュール。 - 前記第1放射素子に対して配置される第1周辺電極と、前記第2放射素子に対して配置され前記第1周辺電極に隣接する第2周辺電極とは、連結されて共通化されている、請求項8に記載のアンテナモジュール。
- 前記第1周辺電極および前記第2周辺電極は、前記誘電体基板の法線方向から平面視した場合に、前記第1放射素子および前記第2放射素子の各々において、前記第1方向に沿った辺、または、前記第2方向に沿った辺に斜辺が対向する略直角三角形の形状を有する、請求項9に記載のアンテナモジュール。
- 各放射素子に高周波信号を供給するように構成された給電回路をさらに備える、請求項1~10のいずれか1項に記載のアンテナモジュール。
- 請求項1~11のいずれか1項に記載のアンテナモジュールを搭載した、通信装置。
- 第1偏波方向に電波を放射する放射素子に高周波信号を供給するように構成された回路基板であって、
複数の誘電体層が積層された誘電体基板と、
前記放射素子に対向して配置された接地電極と、
前記放射素子と前記接地電極との間の複数の層に形成され、前記接地電極と電気的に接続された周辺電極とを備え、
前記周辺電極は、前記第1偏波方向に平行な第1方向および前記第1偏波方向に直交する第2方向の少なくとも一方に対して対称な位置に配置される、回路基板。
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CN202311168767.0A CN117293530A (zh) | 2019-09-27 | 2020-07-06 | 天线模块和搭载该天线模块的通信装置以及电路基板 |
KR1020227009740A KR102432311B1 (ko) | 2019-09-27 | 2020-07-06 | 안테나 모듈 및 그것을 탑재한 통신 장치, 그리고 회로 기판 |
DE112020003999.4T DE112020003999B4 (de) | 2019-09-27 | 2020-07-06 | Antennenmodul, Kommunikationsvorrichtung, die mit demselben befestigt ist, und Schaltungsplatine |
CN202080067617.9A CN114521307B (zh) | 2019-09-27 | 2020-07-06 | 天线模块和搭载该天线模块的通信装置以及电路基板 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022226735A1 (zh) * | 2021-04-26 | 2022-11-03 | 鸿富锦精密工业(武汉)有限公司 | 双频双极化天线及电子设备 |
WO2022264765A1 (ja) * | 2021-06-18 | 2022-12-22 | 株式会社村田製作所 | アンテナモジュールおよびそれを搭載した通信装置 |
WO2023157450A1 (ja) * | 2022-02-16 | 2023-08-24 | 株式会社村田製作所 | アンテナモジュールおよびそれを搭載した通信装置 |
WO2023188785A1 (ja) * | 2022-03-28 | 2023-10-05 | 株式会社村田製作所 | アンテナモジュールおよびそれを搭載した通信装置 |
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WO2021059738A1 (ja) * | 2019-09-27 | 2021-04-01 | 株式会社村田製作所 | アンテナモジュールおよびその製造方法、ならびに、集合基板 |
JP7159512B1 (ja) * | 2022-03-02 | 2022-10-24 | Fcnt株式会社 | アンテナ装置、無線端末及び無線モジュール |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016153459A1 (en) * | 2015-03-20 | 2016-09-29 | AMI Research & Development, LLC | Passive series-fed electronically steered dielectric travelling wave array |
US20160315397A1 (en) * | 2015-04-21 | 2016-10-27 | Kyocera Corporation | Antenna board |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5328566B2 (ja) * | 2009-08-26 | 2013-10-30 | 京セラ株式会社 | アンテナ基板およびicタグ |
JP6572924B2 (ja) | 2017-03-02 | 2019-09-11 | Tdk株式会社 | アンテナ装置 |
KR101986170B1 (ko) * | 2017-09-27 | 2019-06-07 | 엘지전자 주식회사 | 전자 장치 |
WO2019066176A1 (ko) | 2017-09-27 | 2019-04-04 | 엘지전자 주식회사 | 전자 장치 |
US11088468B2 (en) * | 2017-12-28 | 2021-08-10 | Samsung Electro-Mechanics Co., Ltd. | Antenna module |
US10833414B2 (en) * | 2018-03-02 | 2020-11-10 | Samsung Electro-Mechanics Co., Ltd. | Antenna apparatus and antenna module |
CN109546326A (zh) * | 2018-12-14 | 2019-03-29 | 维沃移动通信有限公司 | 一种天线及终端设备 |
-
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016153459A1 (en) * | 2015-03-20 | 2016-09-29 | AMI Research & Development, LLC | Passive series-fed electronically steered dielectric travelling wave array |
US20160315397A1 (en) * | 2015-04-21 | 2016-10-27 | Kyocera Corporation | Antenna board |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022226735A1 (zh) * | 2021-04-26 | 2022-11-03 | 鸿富锦精密工业(武汉)有限公司 | 双频双极化天线及电子设备 |
US11923611B2 (en) | 2021-04-26 | 2024-03-05 | Hong Fu Jin Precision Industry (Wuhan) Co., Ltd. | Dual-frequency and dual-polarization antenna and electronic device |
WO2022264765A1 (ja) * | 2021-06-18 | 2022-12-22 | 株式会社村田製作所 | アンテナモジュールおよびそれを搭載した通信装置 |
WO2023157450A1 (ja) * | 2022-02-16 | 2023-08-24 | 株式会社村田製作所 | アンテナモジュールおよびそれを搭載した通信装置 |
WO2023188785A1 (ja) * | 2022-03-28 | 2023-10-05 | 株式会社村田製作所 | アンテナモジュールおよびそれを搭載した通信装置 |
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